Dovetailing-machine.



0. O. WYSONG. DOVETAILING MACHINE.

APPLICATION FILED rmzs, 1911.

1 1 21 ,706, Patented Dec. 22, 1914.

6 SHEETS-SHEET 1.

O. C. WYSONG. DOVETAILING MACHINE.

APPLICATION FILED r1111. 23, 1911.

6 SHEETSSHEET 2 I Patented Dec. 22, 1914.

(Juvcufoz O. C. WYSONG.

DOVETAILING MACHINE.

APPLICATION FILED FEB.23,1911.

1,121,706. Patented Dec. 22, 1914.

6 SHEETS SHBBT 4.

'HE NORRIS PETERS CO1. PHOTU-LITHLL. WASHINOIUN n 1 O. C. WYSONG.

DOVETAILING MACHINE.

APPLICATION FILED PEB.23. 1911.

Patented Dec. 22, 1914.

6 SHEETS-SHEET 5.

8 m undo;

Wan mom 0. G. WYSONG.

DOVETAILING MACHINE.

APPLICATION FILED rm.2s,1o11.

1,1 21,706. Patented Dec. 22, 1914.

6 SHEETSSHEET 8.

H I/ J H! Ewwnhw q/vifncoscs 3? C 14/,

OLIVIEDO GORTEZ WYSONG, 0F GREENSBORO, NORTH CAROLINA.

DOVETAILING-MACI-IINE.

Application filed February 23, 1911.

To all whom it may concern:

Be it known that I, Omrnno CoR'rEz VVYsoNo, a citizen of the UnitedStates, residing at Greensboro, in the county of Guilford and State ofNorth Carolina, have invented certain new and useful Improvements inDovetailing-Hachines, of which the following is a specification.

My invention relates to improvements in dovetailing machines.

One of its objects is to provide a machine in which the spindles may bebelt driven and at higher speeds.

Another object is to provide for cutting part of the grooves as the workpasses across the bits in one direction and another set of grooves asthe work returns across the bits, or by duplicate application of thework to the bits, thereby permitting the use of larger and strongerspindles and larger driving pulleys.

Another object is to provide means to rough-cut the work before it isacted upon by the finishing bits, whereby the finishing bits arerelieved from excessive work and strain, the work from being splintered,and heatingof the bits is avoided.

Another object is to provide means to trim, cut or surface the ends ofthe work either simultaneously with or as a part of the generaloperation of cutting the clovetailing grooves to insure the ends beingsmooth and true relative to the grooves to facilitate accurate jointswith work members grooved in counterpart.

Another object is to provide means where by the relative position of thebits or cutters, and work is automatically shifted.

Another object is to provide improved automatic belt shifting and workfeeding mechanism.

Another object is to provide improved spindle supporting and adjustingmechanism.

Another object is to provide means whereby the relative position of therough-cut tools and work is automatically shifted.

Another object is to provide means to hold and feed the work, bothirregular and plain work.

My invention further consists in certain details of form, combinationand arrangement, all of which will be more fully set forth in thedescription of the accompanying drawings, in which:

Figure 1 is a front elevation of my im- Specification of Letters Patent.

Patented Dec. 22, 1914.

Serial No. 610,205.

proved mechanism. Fig. 2 is a detail perspective view of one class ofwork. Fig. 3 is a detail partly in section of part of the tool shiftingmechanism. Fig. 4 is a side elevation of the mechanism illustrated inFig. 1. Fig. 5 is a detail perspective View of another class or stage ofthe work. Fig. 6 is a sectional detail on line 2 .2 of Fig. 4.illustrating the spindle driving mechanism. Fig. 7 is a top plan view ofthe mechanism illustrated in Fig. 1. Fig. 8 is a detail of one of thetool shifter tripping mechanisms. Fig. 9 is a detail partly in sectionof the rough-cut tool shifting mechanism. Fig. 10 is a detail partly insection of the rough-cut tools and their supporting, adjusting andshifting mechanism. Fig. 11 is a detail partly in section andillustratingthe spindles and their supporting and adjusting mechanism inrear end elevation. Fig. 12 is a sectional detail through the spindlesupporting and adjusting mechanism on line a; m of Fig. 11. Fig. 13 is aperspective view of one class of completed work. Fig. 14: is aperspective view of another class of completed work. Fig. 15 is avertical sectional detail of the mechanism employed to feed the class ofwork 7 illustrated in F 20, with the mechanism in the initial position.Fig. 16 is a similar view illustrating the work in contact with thebits. Fig. 17 is a sectional detail 011 line 4) 'v of Fig. 15. Fig. 18is a sectional detail taken on line If t of Fig. 15 and with the workremoved. Fig. 19 is a perspective view of one of the work guides. Fig.20 is a perspective view of another class of work. Fig. 21 is a centralvertical sectional view through the work table and cutters, andillustrating one form of mechanism by which the ends of the work areadapted to be trimmed or surfaced in one operation with the cutting ofthe grooves. Fig. 22 is a View similar to Fig. 10

and illustrating a modification adapted to trim or surface the ends ofthe work as well as to cut the rough or preliminary grooves. Fig. 23 isa section on line 8 s of Fig. 22 but showing the end surfacing cuttersin side elevation. Fig. 24. is an enlarged detail partly in section ofone of the finish cutters and illustrating a modification adapted totrim or surface the ends of the work simultaneously with the finish cutin the grooves. Fig. 25 is a plan view of a partially completed piece ofwork illustrating the operation of the cutter Fig. 24:.

The work supporting membera 'lhe accompanying drawings represent thepreferred embodiments of my invention.

A represents the frame of the machine to the front of which is secured avertically movable work table B, which is adapted to support flat worksuch as the sides, ends and bottoms of furniture drawers or othersimilar parts to be dovetailed. The table B is provided with adjustableguides b b to aline the work sidewise, and a clamping mechanismcomprising uprights b adjust able relative to the table and providedwith a vertically movable cross bar 6 and an eccentric roller 6journaled in the heads of the uprights 6 which eccentric when actuatedby hand lever b serves to clamp a number of pieces of flat work w inposition to be acted upon at one operation in the manner indicated inFigs. 2 and 5.

A guide 1) against which the ends of the work w are adapted to he alinedis carried by frame A. v

In order to support drawer fronts either straight or of irregularoutline, or other work to be treated endwise as indicated in- Fig. 20, Iprovide vertical rods or bars D E which are adapted to slide verticallyin bearings a carried by the frame A. The lower ends of bars D areconnected by pins (Z to crank arms d of a rock-shaft d journaled to theframe A. An arm (Z projecting from shaft (Z is provided with an adjustable weight (Z which serves to hold the rods D normally in anelevated position. The rods E are attached by means of links 6 pivotallyconnected respectively to treadle e and a crank arm 6 carried by arock-shaft c journaled to frame A. The rods E are normally held in anelevated position by means of springs 6 attached at one end to collars 6locked to said rods E, and at the opposite ends to studs e projectingfrom frame A r A cross-bar F, or support for the lower end of the workis adjustably secured to the rods 1) by means of set screws 7 and acrossbar G or support for the upper end of the work, is adjustablysecured by set screws 9 to the rods E. The cross-bar F has a series offingers 7" curving downwardly and thence projecting horizontally, withshoulders f at the intersection of the curved and hori- Zontal sections.The end of the drawer front or other work l/V to be treated rests uponthehorizontal sections with one edge alined against the shoulders 7,while the spacesbetween the respective fingers are sufficient for thedovetailing bits to pass and out two dovetail grooves to each space. Anadjustable cross-bar f is adapted to be adjusted to aline with and guidethe opposite edge of the plates 7 are adapted to act as edge guides orspacing bars to enable a series of pieces work, and adjustable angle ofwork to be out in duplicate. The curved sections of the fingers f serveto hold the work away from the' main bar F to permit are provided to Thecross-bar G has adjustable edge and face guides or spacing bars 9 toguidethe upper end of the work to the desired position.

The cross-bars F G are adapted to be adjusted to the upper portion ofthe rods D E when not in use, to provide room for the movements of thework table B. When in use the bar F is adjusted to a position slightlyabove the cutters or bits and the cross bar G to a position above thebar F slightly greater than the length of the work to be treated. Upondepressing the treadle e the bar G which is slightly out of contact withthe upper end of the work W descends upon and grips the work firmlybetween the two cross bars F G and a further depression of the treadlecauses both cross bars to descend bringing the work in contact with thedovetailing bits, the bar F carrying with it the rods D-which rock theshaft d and lift the weight cl, and when the treadle is released theweightrestores rods D and bar F to their elevated position while thesprings e restore the treadle, rods E and bar G to elevated position.The rock Additional adjustable edge shafts (Z 6 through theirconnections with the rods D E insure uniform movement of ice therespective rods D E and uniform horizontal position for the cross bars FG.

The preliminary cutters.*vVork w clamped upon the table is adapted to befirst acted upon by a series of rough-cut instruments, preferably aseries of saws or cutter heads H mounted and suitably'spaced upon ashaft H adapted to be driven by means of a belt pulley h. Forconvenience in obtaining access to the toolsH the shaft H"- ispreferably mounted in a movable bearing it near the pulley h and a rigidbearing h at its opposlte end, said bearings being preferably secured bydovetailed joints h toa cross frame 72. v sliding in horizontal guidesIt or ways it b on the frame A. The hearing it is rigidly secured to thecross frame h by bolts h, while the hearing it is secured to the crossframe while in operation by a bolt H, but when said bolt is removed isadapted to slide endwise out of engagement with the dovetail groove hand onto a pivotally supported shelf or bracket I .having acorresponding dovetailed groove -to'receive and hold the bearing h andshaft H in position where access may behad to the tools H. The bracket Iis pivoted to the frame A by means of ears 2" i and a pin 2' and may bedetached or swung around against the side of frame A or into position toreceive or replace the bearing h upon the cross frame h as desired. Thehearing it has a dowel pin h which assists to center it with the bearing72.2.

The several saws or tools H are preferably mounted upon a sleeve J whichis splined upon and movable endwise to a limited extent upon shaft H,said tools H being separated by spacing collars it and locked upon saidsleeve by a nut or threaded collar J, while an annular groove is adaptedto be engaged by rollers or studs 7" of a forked arm 7' to shift saidsleeve endwise upon shaft H.

Sleeves K project rearwardly from the cross frame it and at their freeends are seated in bearings in the rear end of frame A. Sleeves K areinternally threaded to engage threaded feed rods 70 journaled inbearings L at the rear end of frame A. Outside frame A rods 7: areprovided with sprocket wheels 7c which are connected together so as tomove in unison by a sprocket chain if. A hand wheel is on one of therods 7c serves to adjust both rods 70 and thus to feed the cross frameit carrying with it the shaft H and tools H either to or from the worktable B, to vary the depth of cut, and to aline the journal of shaft Hwith the bracket 1 when it is desired to remove the tools H.

The finds/L cuttera-lvlounted in guides 2 on the top of frame A is ahorizontally adjustable frame 3 adapted to move from side to side acrossthe table. Mounted in guides i on the frame 3 is a frame 5 movableendwise relative to frame A and adjustable by means of a screw rod 6journaled to frame 5 and threaded to a projection 7 of frame 3, andadjustable by means of a knurl 8. Journaled to the frame 5 are a seriesof spindles 9 armed with dovetailing bits or tools 10,

which are individually adjustable endwise by means of bolts 11 threadedinto the ends of the spindle bearings and adapted to be locked toadjusted position by collars 12 adapted to act lock nuts. The bits 10are adapted to be adjusted into alinement vertically above the saws H sothat as the Work table ascends the sawsmake the first or rough cuts inthe work as indicated inrfull line in Fig. 2, while the bits 10 being oftapered or conical outline further out the grooves in the work to thetapered or dovetailed out line indicated in Fig. 5, which relieves thecutters 10 from excessive heat and work, permits cuts through severalthicknesses of work at one operation, and provides for the escape of thecuttings, and prevents breaking off of the corners of the work orsplintering of the work, particularly on the side where the bits emergefrom the cuts, which would otherwise be liable to occur.

In order to provide spindles of ample di ameter, and space between thespindles for pulleys by means of which the spindles may be belt drivenand at the high speed requr site for satisfactory work, the spindles arespaced on frame 5 so that the number of bits 10 employed is only halfthat of the saws H, and with the bits primarily spaced verti cally abovealternate saws. I further provide after the work on the table has beenelevated to clear the bits 10, and the bits 10 have made their cutthrough alternate saw cuts, that frame 8 carrying the frame 5 and bits10 shall automatically move laterally a distance equal to the spacebetween centers of the saw cuts, so as to bring the bits 10 intovertical alinement beneath the balance of the saw cuts, whereupon thework table is fed downwardly to make the finish cut of the bits 10through said alternate saw cuts.

The war/c table feed.The work table B is fed vertically forward andbackward on ways by means of a screw rod lat journaled to frame A at 15and threaded into a nut 16 on the table B. The lower end of screw rod li is provided with a beveled gear 17, which is continually in mesh witha pair of beveled gears 18 19. The gear 18 is rigidly mounted upon asleeve or tubular shaft 20, to the opposite end of which is rigidlyconnected a belt pulley 21. The gear 19 is rigidly mounted upon a shaft22 concentrically journaled within the sleeve 20, and having rigidlysecured at its opposite end a belt pulley A pulley 2f is loosely mountedupon the sleeve 20 between the pulleys 21 and A belt L is adapted toengage any one of the pulleys 21, 23, 24, and a belt shifter 25 to shiftsaid belt from one pulley to the other. Said belt shifter is pivoted at26 to the frame A, and has a hand lever 27 provided with a springactuated latch bar 28 adapted to engage a stud 29 projecting from frameA to lock the belt shifter with the belt in engagement with pulley 23,which serves to elevate table B. As table B reaches the desired maximumelevation, an adjustable trip 30 carried by table B is adapted torelease the latch bar 28 from the stud 29, whereupon spring 31 pulls thebelt shifter over and shifts the belt to pulley 21, which automaticallyreverses the table feed. The downward table feed continues until thetable contacts with arm 32 of the belt shifter and thereby shifts thebelt to the loose pulley 2i and automatically stops the table feed.

The lateral spindle feecZ./Vhen the table B reaches its maximumelevation the spindles 9 are automatically shifted laterally preferablyas follows: A shaft 33 is journaled to the frame A and provided at oneend with a friction clutch member S t tight on shaft 33. A frictionclutch member 35 is loosely journaled on shaft 33 and the two clutchmembers held yieldingly in enagement by means of a spring 36 the tension.of whichis adjustably regulated by nuts 37 The clutch member isprovided I with a belt pulley 38 and driven by a belt 39 from a pulleye0 on shaft ll. At the opposite end shaft 33 is provided with acylindrical head 42 which is provided with rectangular projections ordogs d3 which are adapted to be engaged by a latch bar at to alternatelystop and start the rotation of shaft 33. The shaft 33 is connected toframe 3 carrying the spindles 9 by means of an eccentric 15 and aneccentric rod 46. The eccentric 45 is preferably adjustable as to itsdegree of eccentricity with reference to shaft 33, and the eccentric rodadjustable as to length, whereby the extent to which frame 3 is shiftedlaterally may be varied. A trip t7 carried by a bracket M attached at 48to the table B is adapted as table 13 reaches its maximum elevation tolift the latch bar 14, which is guided by a keeper m, and to releasesaid latch bar from the stud 1-3 with which it is engaged, whereupon theshaft 33 commences to revolve bringing a projection 49 on the face ofthe head 5L2 into engagement with the part m of the trip 47, therebythrowing the trip 47 out of engagement with the latch bar at andallowing the latch bar to assume a position to catch the oppositeprojection 13 and stop the rotation of shaft 33. N represents a rubberbuffer to receive the shock of the engagement of the projections 1-3with the latch bar 14:. Thus shaft 33 makes a half revolu tion each timethe latch bar if is tripped and thus alternately shifts the frame 3 andbits 10 laterally with reference to the frame A and table B. A similartripping mechanism 50 is adjustably connected to a collar or bracket Padjustably connected to the rod D and adapted to be adjusted to positionto engage and trip the latch bar when the table B is out of use and thecross bars F, G, are employed to treat work N of the characterillustrated in Fig. 20.

The lateral adjustment of the rough-cut t00ls.A shaft 51 and mechanismthe duplicate of that heretofore described as carried by shaft 33 isprovided with a latch 52 and driven by a belt 53 from a pulley 54: onthe shaft il. An eccentric 55 on'shaft 51 is provided with an eccentricrod n connected at its opposite end to a sleeve n threaded to the shankof the forked lever 7' which serves to shift the sleeve J carrying thesaws H endwise on the shaft H. The eccentric 55 is adjustable to varyits eccentricity relative to shaft 51, and the sleeve n; is alsoadjustable to and from the center n by means of which the lever 7' ispivotally connected to frame A. By adjusting the eccentric 55 or thesleeve n on the lever j the extent to which the saws will be shiftedendwise on shaft H may be varied as desired. A trip 56 carried bybracket M serves to trip the latch 52 to shift the saws as heretoforedescribed for. the trip 47. WVhere itis desired to match the worktogether with rectangular tongues and grooves as indicated in Fig. 14:the lateral adjustment of the saws permits the use of the tools 10 to bedispensed with, and by employing the lateral adjustment of the saws thesaws cut the grooves 57 as illustrated in full line Fig. 2 at the upwardmovement of the table B; and after the saws have cleared the work andhave been shifted laterally, serve to cut away a further portion ofmaterial indicated in dotted line Fig. 2, at the downward movement-ofthe table, thus permitting grooves of varying width and depth to be cut,with comparatively narrow saws, and also permitting both styles of workindicated in Figs. 13 and 14 to be done without change in the cutters Has ordinarily employed in connection with the tools 10.

The spindle driving meehanism.T he respective spindles 9 are mounted inbearings 60, 61 on the frame 5, and are provided with belt pulleys 62,63, which on alternate spindles are separately alined to provide forspace in which to employ pulleys of ample diameter. A belt 64: serves todrive two of the spindles by means of pulleys 62, being also strainedover a pulley 65 on driving shaft 41 and over idler pulley 66 carried bya stationary frame 67 attached to frame A, and also over idler pulley 68carried by a movable frame 7 O which is hinged at one end at 71 to frame67 and free at its opposite end, and by its weight serves to tension thebelt 64 and to provide for the movements of the spindle carrying frame3. A belt 72 serves to drive three spindles by means of pulleys 63,being also strained over pulley 73 on shaft 41, idler 74 on frame 67 andidler 75 on movable frame '70 which also serves to tension belt 7 2. Atight pulley 77 and loose pulley 78 on the rear end of shaft ll serve todrive shaft 41. by means of a belt from a countershaft. I

The end trimming mechanism.ln fitting the tongues w of the work w intothe grooves N of the work W, see Fig. 13, it is desirable to have anaccurate fit not only at the sides but also at the ends of the tongues,and work which has been defectively surfaced across the ends beforebeing placed on table B, or which is not accurately alined with theplate 6 is liable not to fit at the endsof the tongues tv with thegrooves of work W. I have discovered that by trimming or surfacing theends of the work w in one operation with the formation of the groovesinthe work w, I am enabled to secure a uniform fit of great accuracy atthe ends of the tongues w and also superior work of the characterindicated in Fig. 14:,

and also where counterpart pieces of work such as illustrated in Fig. 5are matched together.

As illustrated in Fig. 21 I provide in addition to the preliminarygroovingcutters the end of the work w to bring it to true and accuratedimensions with reference to the cuts made by cutters H or 10 to insurean accurate fit with the parts with which it is intended to interlock.

As illustrated in Figs. 22 and 23, a series of trimming cutters H arearranged at opposite sides of the respective cutters H upon the sleeve Jand serve to trim or surface the ends of the work at the same time thatthe cutters ll make the preliminary grooves in the work;

As illustrated in Fig. 24: each cutter 10 is formed integral with athreaded body member 92 from which a portion of the threads are turnedaway at 93. The member 92 carries a dowel or stem 97 seating in acorresponding bore or recess in the end of ti e spindle 9 to assist inholding the cutter 10 in axial alinement with the spindle 9. The forwardend of the spindle 9 is threaded and an internally threaded sleeve 95engages the threads on member 92 and on spindle 9 and serves to locksaid member 92 firmly to the spindle. A set screw 9% en aging the face93 of member 92 serves to prevent the members becoming loose ordisconnected. The forward end of sleeve 95 is provided with teeth orcutters 96 wnich serve to trim or surface the ends of the worksimultaneously with the finish cut in the grooves as indicated in Fig.25, where 98 indicates the trimmed portion of the end of the work. Asthe cutters 10 are shifted transversely to make the finish cuts throughthe alternate set of grooves 57, the cuts 98 made by the cutters 96overlap with their previous cuts thus producing a uniform cut entirelyacross the end of the work.

It is within the contemplation and scope of my invention to attain therelative lateral movement between the work and cutters by the movementeither of the cutters or the work.

The mechanism herein illustrated and described is capable ofconsiderable modification without departing from the principle of myinvention.

Having described my invention, what I claim is:

l. A dovetailing machine comprising a reciprocating work holder, aseries of cutters projecting into the path'of the work when carried bysaid work holder, said cutters being arranged in a zone transversely tothe path of travel of the work, and means to change the relativeposition of the work and cutters in a direction substantially parallelto said zone between respective engagements of the work and cutters.

22. A dovetailing machine comprising a plurality of rotary cuttersprojecting into and arranged across the path of travel of the work so asto make independent cuts in the work, a work holder adapted to feed thework forward and backward across said cutters, and means to alter therelative position of the cutters and work during the interval betweenthe disengagement of the work from said cutters on its forward movementand its engagement with the cutters on its reverse movement, to enablesaid respective cutters to form one recess in the work at the forwardfeed of the work and another recess in the work at the reverse feed ofthe work.

3. In a mechanism of the character described, a work holder adapted totravel in a forward and reverse direction, means to clamp work to saidholder, a plurality of retary cutters adapted to engage the work on boththe forward and reverse movement of the work holder, means to alter therelative position of said work holder and cutters during the intervalbetween the disengagement of the work from said cutters on its forwardmovement and its engagement with said cutters on its reverse movement toenable said cutters to form separate series of re cesses in the work atforward and reverse movements of the work.

f. A dovetailing machine comprising a plurality of power driven rotarvcutters projecting into and arranged across the path of travel of thework. a work holde ada ted to be fed in forward and reverse directionacross said cutters and provided with guides adapted to hold successivepieces of work to a uniform position relative to said holder, and meansto alter the relative posit on of said work holder and cutters duringthe interval between the disengagement of the work from said cutters onits forward movement and its engagement with said cutters on its reversemovement to enable said respective cutters to form separate recesses inthe work at forward and reverse movements of said work holder.

In a mechanism of the character described, a pluralit'v of power drivenrotarv cutters, a work holder adapted to be fed in forward and reversedirection across said cutters, said work holder being provided withmechanism to hold successive pieces of work to a uniform positionrelative to said holder, and mechanism to automatically alter therelative position of said work holder and cutters during the intervalbetween the disengagement of the work from said cutters on its forwardmovement and its engagement with said cutters on its reverse movement toenable said cutters to form separate series of recesses in the work atforward and reverse movements of said work holder. v

6. A dovetailing machine comprising a plurality-of rotary cuttersprojecting into and arranged across the path of travel of the work, areclprocating work holder,

means to reciprocate the work holder to and movable transverselyrelative to the work feed, a reciprocating work holder adapted to be fedforward and backward across said cutters, means to lock the work toposition relative to said holder, and means to shift said cutterstransversely relative to the work feed during the interval between thedisengagement of the work from said cutters when feeding in onedirection and its engagement with the cutters when feeding in thereverse dIIGClZlOIl.

8. A dovetailing machine comprising a plurality of rotary cuttersarranged across and projecting into the path of travel of the work, apower driven work holder having guides adapted to hold successive piecesof work to a uniform position relative to said holder, mechanism toreciprocate said work holder forward and backward across said means tolock the work to position cutters,

and mechamsm to relative to said holder,

alter the relative position of said work holder and cutters during theinterval between the disengagement of the work from said cutters whenfeeding in one direction vand its engagement with said cutters whenfeeding in the reverse direction.

9. In a mechanism of the character described, a plurality of rotarycutters movable transversely relative to the work feed, a power drivenwork holder, means to lock the work to position relative to said workholder, mechanism to reciprocate said work holder forward and backwardacross said cutters, and mechanism to shift said cutters transverselyrelative to the work feed during the interval between the disengagementof the work from said cutters when feeding in one direction and itsengagement with said cutters when feeding in the reverse direction.

10. In a mechanism of the character described,'a plurality of rotarycutters adapted'to make a preliminary cut in the work, a plurality ofrotary finish cutters adapted to follow in the cuts made by saidprelimicuts made by said nary cutters to make a finish cut in the work,a reciprocating work holder, means to lock the'work to position relativeto said work holder, and means to alter the relative position of saidwork holder and finish cutters a reciprocating work holder adapted tofeed the work forward respective cutters.

152. In a mechanism of the character described, a plurality of rotarycutters adapted to make a preliminary cut in the work, a plurality ofrotary cutters adapted to make a finish cut in preliminary cutters, anda reciprocating work holder adapted to be fed forward and backwardacross said out and backward across said the work through the ters, saidwork holder being provided with 7 means to clamp the work so as topresent the end of the work to said respective cutters.

, 13. In a mechanism of the character described, a plurality of rotarycutters adapted to make a preliminary cut in the work, a pluralit; ofrotary cutters adapted to make a finish cut in the work through the cutsmade by said preliminary cutters, and an automatically controlledreciprocating work'holder adapted to feed the work forward and backwardacross said preliminary and finish cutters.

1 1a. A dovetailing machine comprising a plurality of rotary cuttersarranged across and projecting into the path of travel of the work andadapted to make preliminary cuts in the work, a plurality of conicalrotary work through the grooves made by said preliminary cutters, areciprocating work holder provided with clamping means adapted topresent the 'end of the work successively to said preliminary and finishcutters, and means to feed said work holder forward and backward acrosssaid respective cutters.

15. In a mechanism of the character described, a plurality of rotarygrooving cutters adapted to make a preliminary cut in the work, aplurality of conical rotary cutters adapted to make a finish cut in thework through the grooves made by said grooving cutters, a reciprocatingwork holder adapted to feed the work forward and backward across saidgrooving and conical cutters and means to alter the relative position ofsaid Work holder and conical cutters during the interval between thedisengagement of the Work from said conical cutters When feeding in onedirection and its engagement With said cutters when feeding in thereverse di-r rection.

16. In a mechanism of the character described, a plurality of rotaryspindles re spectively armed with dovetailing cutters, a frame movablein the direction of the axes of said spindles and to which said spindlesare journaled, a frame movable transversely of the spindle axes and onwhich said spindle carrying frame is mounted, means to drive saidrespective spindles, a Work holder adapted to feed the Work forward andback- Ward across said cutters and mechanism to shift said spindlestransversely of their axes during the interval between the disengagement of said Work from said cutters and the reengagement of the WorkWith said outters.

17. In a mechanism of the character described, a plurality of rotaryspindles respectively armed with dovetailing cutters, a frame movable inthe direction of the axes of said spindles and to Which said spindlesare journaled, means to adjust said spindles indi idually in thedirection of their axes relative to said frame, a member upon Which saidspindle carrying frame is mounted movable transversely of the spindleaxes, means to drive said respective spindles, a Work holder adapted tofeed the Work forward and backward across said cutters, and means toshift said spindles transversely of their axes during the intervalbetween the disengagement of the work from said outters and thereengagement of the Work with said cutters.

18. In a mec ianism of the character described, a plurality of rotaryspindles respectively armed with dovetailing cutters, a spindle caringrframe movable in the direction of the spindle axes and to which saidspindles jcurnalerha member upon which said spindle carrying frame ismounted movable transversely of the spindle axes, means to drive saidrespective spindles, a \vor: holder adapted to feed the work into andout of engagement with said cutters, and mechanism to shift saidtransversely movable member during the interval between thedisengagement of the Work with said cut'ers and the reengagement of thevvorlic with said cutters.

19. In a mechanism of the character described, a plurality of rotaryspindles respectively armed with dovetailing cutters and provided Withbelt pulleys, a frame movable in the direction of the axes of saidspindles, and to which said spindles are journaled, a member upon Whichsaid spindle carrying frame is mounted movable transversely of thespindle axes, a driving shaft provided with a belt pulley,a beltreceiving motion from said driving belt pulley and adapted to drive saidrespective spindles, means to yieldingly tension said belt, a workholder adapted to feed the Work into and out of engagement with saidoutters, and mechanism to shift said transversely movable member duringthe interval between the disengagement of the work With said cutters andthe reiFngagement of the work with said cutters.

20. In a mechanism of the character described, a plurality of rotaryspindles respectively armed ith dovetailing cutters and provided withbelt pulleys, alternate pulleys on said spindles being in separatealinement, a frame upon which said spindles are journaled movabletransversely of the spindle axes, a driving shaft provided with aplurality of spindle driving belt pulleys, separate belts receivingmotion from said respective driving belt pulleys and adapted to engagerespective series of pulleys on said spindles, means to yieldinglytension said belts, a work holder adapted to feed the Work into and outof engagement with said cutters, and mechanism to shift said spindlecarrying frame transversely during the interval between thedisengagement of the Work from said cutters and the reengagement of theWork with said cutters.

21. In a mechanism of the character described, a plurality of rotaryspindles respectively armed with dovetailing cutters, IIHHDS to drivesaid respective spindles, a frame upon which said spindles are supportedand ournaled, said frame being movable transversely of the spindle axes,an intermittently rotating shaft, mechanism connecting said shaft tosaid frame and adapted to intermittently shift said frame transverselyof the spindle axes, and a Work holder adapted to feed the Work into andout of engagement With said cutters.

22. In a mechanism of the character described, a plurality of rotarygrooving cutters adapted to malze a preliminary cut in the Work, aplurality of conical rotary cutters adapted to make a finish cut throughthe cuts mane by said grooving cutters, a reciprocating \vork holderadapted to feed the Work forward and backward across both thepreliminary and finish cutters, and mechanism to independently adjustsaid preliminary and finish cutters into and out of operative positionwith said Work holder without disturbing the relative individualadjustment of said respective series of cutters.

23. In a mechanism of the character described, a plurality of rotaryspindles respectively armed with dovetailing cutters, means to drivesaid spindles, a frame movable in the direction of the spindle axes andto which said spindles are j ournaled, a frame supporting said spindlecarrying frame and movable transversely of the spindle axes, a shaftoperatively connected to said transversely movable frame, a positivelydriven clutch member, a clutch member held yieldingly in engagement withsaid positively driven clutch member and adapted to rotate said shaft, alatch bar adapted to lock said shaft against rotation, a movable workholder and means movable in unison with said work holder to release saidlatch bar and permit said shaft to rotate.

24. A dovetailing machine comprising a plurality of rotary cuttersprojecting into and arranged across the path of travel of the work so asto make independent cuts in I the work, a work holder to feed the work.forward and backward across said cutters,

position to repeat its operation.

25. A dovetailing machine comprising a I plurality of rotary cuttersarranged across and projecting into the path of travel of the work, areciprocating work holder adapted to reciprocate the work forward andbackward across the path of said outters, and to engage the work withsaid cutters on both forward and backward movement of said work holder,and means to alter the relative position of said cutters and work holdertransversely during theinterval between the disengagement of the workwith said cutters and its reengagementwith said cutters, to present anew portion of the work to said cutters on both forward and backwardmovement of said work holder.

26. In a mechanism of the character described, a plurality of rotaryspindles armed at one end with cutters adapted to cut dovetail groovesin the work, a reciprocating work holder adapted to carry the work intoengagement with said cutters, mechanism to lock the work to said workholder, a plurality of rotary cutters carried by said spindles andadapted to surface the end of the Work adjacent to said dovetailgrooves, and means to intermittently shift said spindles transversely tothe Work feed thereby causing separate cuts of said end surfacingcutters to overlap each other.

27. A. 'dovetailing machine comprising a plurality of rotary spindles, aplurality of conical cutters carried by said spindles, said cuttersbeing arranged across the path of travel of thework so as to projectinto the path of travel of the work and adapted .to out dovetail groovesin the work, a work holder adapted to feed the work into engagement withsaid cutters, mechanism to lockthe work to said work holder, a pluralityof rotary cutters carried by said spindles and adapted to surface theends of the work, and mechanism to intermittently alter the relativeposition of said cutters and work holder transversely to cause separatecuts of said end surfacing cutters to overlap each other.

28. In a mechanism of the character described, a plurality of rotaryspindles armed vith dovetailing cutters, a plurality of work holderssubstantially in a plane with but at opposite sides of said cutters,saidrespective work holders being adapted'to hold work of differentcharacter from each other, each work holder having an idle position freefrom interference with the use of the opposite work holder, and eachadapted to feed work into engagement with said cutters.

29. In a mechanism of the character described, a plurality of rotaryspindles armed with dovetailing cutters, a pair of work holders locatedin substantially the same plane with said cutters and at opposite sidesthereof and adapted to respectively present work from opposite sides tothe action of said cutters, one of said work holders being adapted topresent the work in position to cut tongues and grooves and the oppositework holder to present work in positionto form blind mortises.

30. In a mechanismof the character described, a plurality ofrotaryspindles armed with dovetailing cutters, a pair of work holders locatedsubstantially in a plane with and at opposite sides of said cutters andadapted to be selectively employed to independently present work fromopposite sides to the action'of said cutters, one of said work holdersbeing adapted to present the face of the work to said cutters and theopposite work holder being adapted to present the end of thework to saidcutters.

31. In a mechanism of the character described, a plurality of rotaryspindles armed with dovetailing cutters, a plurality of work holders atopposite sides of said cutters adapted to independently present work tosaid work holders adapted to shift said cut-V ters transversely of thework holder feed.

32. A dovetailing machine comprising a plurality of grooving cuttersarranged across and projecting into the path of travelof the work andadapted to make cuts with or u parallel walls in the work, areciprocating work holder adapted to be fed forward and backward acrosssaid cutters, and mechanism to alter the relative position of saidcutters and work holder transversely during the interval between thedisengagement of the work from said cutters when'feeding in onedirection and'its reengagement with the work when feeding in the reversedirection.

33. A dovetailing machine comprising a plurality of grooving cuttersarranged across and projecting into the path of travel of the work andadapted to make cuts with parallel walls in the work, a plurality ofspindles armed with conical cutters adapted to make finish cuts throughthe grooves of said grooving cutters, a reciprocating work holderadapted to feed the work forward and backward across said respectivecutters, and mechanism to alter the relative position of said conicalcutters and the work holder transversely during the interval between thedisengagement of the work from said outters when feeding in onedirection and its recngagement with the work when feeding in the reversedirection.

3%. In a mechanism of the character described, a plurality of groovingcutters mounted upon a common axis and adapted to cut grooves withparallel walls in the work, a plurality of spindles armed with conicalcutters adapted to make finish cuts 7 through the grooves cut by saidgrooving cutters, a reciprocating work holder adapted to feed the workforward and backward across said respective cutters, and mechanism toalter the relative position of said conical cutters and the work holdertransversely during the interval between the disengagement of the workfrom said cutters when feeding in one direction and its reengagementwith the work when feeding in the reverse direction.

A dovetailing mechanism comprising a plurality of rotary groovingcutters to make a preliminary cut in the work, a plurality of conicalrotary cutters to make a finish cut through the cuts made by saidgrooving cutters, a reciprocating work holder to feed the work forwardand backward across both the grooving and finishing cutters, andmechanism to separately adjust said respective series of grooving andfinishing cutters into and out of operative relation with said workholder without disturbing the individual adjustment of said cuttersrelative to said respective series.

In testimony whereof I have afiixed my signature in presence of twowitnesses.

QLMEDO CORTEZ \VYSONG.

\Vitnesses E. C. \VEISNER, GUY BRANSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C."

